This Demonstration shows a finite Lyapunov exponent of a one-dimensional unimodal map , which is a generalization of the well-known logistic map . The related Lyapunov exponent can be defined by

,

where is the base-2 logarithm, is the iteration number, is the iterate of starting from the initial condition , is the main control parameter, and is the subcontrol parameter, which determines the unimodality, the degree of the local maximum of .